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Using Air to Recharge Your Cell Phone
sanspeak writes "Now you do not have to look for a power outlet to charge your cell phones. Department of Industrial Design at Indian Institute of Technology, Delhi have come up with a mobile turbine which generates around 3 to 4 watts of energy - sufficient to charge a mobile phone. It costs around $4, fits in your pocket and runs on air ;-). What else do you want ?"
Why not use Faraday's Principle of Induction like these LED torches or a windup charger? Both are independent of external factors.
Hanging out your phone from a car, bus or (shock!) train is pretty dangerous stuff, maybe superman will find this thing handy.
I hope they haven't patented this technology yet, 'cos I'm rolling out my air-powered fan next month.
Rock that crushes, Paper & Scissors that don't matter.
They sell radios that can be charged by turning a crank, why not sell a cell phone charger that works that way?
Why? Because people are suckers.
there's this physics law that sais air gets hot when you compress it. If the tank is not insulated it will cool down to room temperature again and you lose quite some energy. There are however examples, there is even a car which runs on compressed air, and in the good old days of steam, they used comp. air locomotives e.g. in ammo factories and other places where you might want to avoid fire.
10 ?"Hello World" life was simple then
This is an incredible step forward, but not for us people who can already charge our cellphones in our cars, in the office, and at home, and just want to charge them in the supermarket, too.
Think wider.
Think mine detectors.
Think Cambodia, Rwanda, Ethiopia.
People who really, really need some piece of low-power electronic equipment, and DON'T have four different charging stations already, and whom it will cost an arm and a leg - literally! - if they are careless.
Coming to think of it, I'm not surprised this comes from India.
The device will help mobile phone users charge their phones while travelling in a bus, a car or a train. All they need to do is -- place the turbine against the wind flow.
So if I need to charge my phone, I can drive my 12 MPG SUV around town and hang this turbine out the window?
Cool! That is such a leap forward.
Those who can do. Those who can't sue.
Lets restate this.... you are really taking energy from the train/bus/car
You increase wind resistance quite a bit just by opening the window. In fact, it has been noted that you are actually better off using the A/C than opening the window, because opening the window decreases your fuel economy more than running the A/C.
Now, unless you have one of those 1980s cell phones that are roughly the size of a boombox of the same era, your cell phone uses less energy than your car A/C.
Frankly opening your window to charge your cell phone is incredibly inefficient and should only be contemplated if you were going to open the window anyway.
Now... mounting it on your motorcycle.... then you are talking. However you
are still only transfering kinetic energy of the vehicle going forward against
the wind into electricity. That kinetic energy is provided by the engine... seems more direct to just get the energy from your alternator.
-Steve
"I opened my eyes, and everything went dark again"
What if the cat merely lands on its feet? The buttered toast will never land, and so the complex won't need to hover. That's the advantage of strapping the toast to the cat's feet, if you believe that the toast has not landed when you do so. If it lands, either the unbuttered side of the toast must touch the ground, or the cat's feet must not be down. There is no middle ground where one can land and the other does not, as there was with the previous model.
Ewige Blumenkraft.
Therefore I feel sorry for you guys. Your law seems insane.
:wq
Racism is telling people they can't drink from the same water fountains as other people, or refusing to sell a house to them based on their skin color, or herding them into gas chambers, or dragging them behind pickup trucks, or chanting "Death to all ABC" where ABC is the race of your choice.
Joking about an accent which, let's be honest here, can sometimes border on absolutely incomprehensible is possibly in bad taste but definitely not RACISM.